Quartz-mill



(No Model.) i

A. E. REDSTONE.

QUARTZ MILL. No. 248,791. Patented 0013.25, 188i.

Z llgllli l q(Jarra States arent trice..

ALBERT E. REDSTONE, OF OAKLAND, ASSIGNOR TO HIMSELF AND FRANK A. HILL,OF SAN LEANDRO, CALIFORNIA.

. QUARTZ-MILL.

SPECIFICATION forming part of Letters Patent- No. 248,791, dated October25, 1881.

Application filed March 2l, 1881.

'T0 all whom t may concern Be it known that I, ALBERT E. RnDs'roNn, ofOakland, in the county7 ot' Alameda, and State of California, haveinvented a new and useful Improvement in Quartz-Mills; and I do herebydeclare that the following is a full, clear, and exact description ofthe same.

My invention relates to an ii'nprovement in quartz-mills; and its objectis an improved IO manner ot' operating the stamps, whereby the quartz issubjected to av grinding as well as a crushing` action duringtheoperation ofthe mill.

The invention consists, mainly, in combining with a stationarybase-plate a revolving frame which carries the stamp, and a series ofcams upon the base which operate the stamps in turn as they revolve.

The invention further consists in various dctails of construction and inthe combination of 2o the operative parts, as fully hereinafter de'scribed.

In the drawings, Figure l represents a perspective view of the entiredevice, with the inclosing-shell partly broken away. Fig. 2 is a centralcross-section, and Fig. 3 is alongitudinal section of one of the cams.

The outer metallic rim or shell of the mill is shown at A. It may becast solid in one piece, preferably *of iron, or may be made in 3osections, united and adapted to be taken apart for portability.

The feed-opening in the side ot" the rim is shown at U; and V Vrepresent chutes, where the pulp after passing through screens T T isdischarged.

The space or chamber within which the pulverizing and crushing iscarried 011 is of annular shape, and is formed by the outer rim, A, andthe wall of a cone, N, formed in one 4o piece with the rim A, orseparately, if desired. In the top of this cone is stepped a verticalshaft, O, the upper end of which runs in bearings Y in the cross-pieceB, the lower ends of which cross-piece are bolted to the shell A, as

shown.

G is a frame mounted on the shaft C, and adapted to revolve with suchshaft. Motion is imparted to shaft and frame by a bevelwheel, D, gearinginto a pinion,V, on a horizontal shaft, E, having a pulley, F,from which(No model.)

a'loelt may run to the engine or other power. The revolving frame G,which I have shown as of octagonal form, carries a series ofstamps, L.Around the bottom of the frame Gis a horizontal flange, G', and throughthis flange pass the 55 stems H of the stamps L. On each stem is abearing-roller, S, and on the frame are guiderollers R R I), betweenwhich the stem passes when reciprocating.

Motion is given the stamps by a'series of 6o stationary adjustable cams,K, mounted on the shell A. rlhese cams consist of an inclined platehaving its bottom deeply slotted and provided with an adjustingscrew, I.The slot fits upon the upper edge of rim or shell A, and the positionofthe cam on thisrim may beadjusted by the screw to vary the force ofthe blow ot' the stamp.

Near the upper part of the cone N is a shoulder, upon which rests thesplash board O, 7o formed like an inverted cone. The purpose of this isto protect the bearings of the shaft O from grit, which would otherwiselodge there.

X is a splash-rim, which prevents the pulp rom working between the outerend of flange G and the shell A.

rlhe dies Z are cast in any desired lengths to t around the bottom ot'the machine inthe path of the stamps.

The purpose of this construction just de- So scribed is to give adoublemotion to the stamp, to effect, besides the crushing caused by thevertical blow of the stamp, a grinding of the quartz between the stampand die, and to accomplish this the operation of the mill is as follows:Motion is imparted to the frame G which carries the stamps, and suchstamps in their revolution are raised and dropped by the camssuccessively. rl'he velocity which the stamps acquire in their movementwith the 9o frame gives them a momentum which causes them to strike aglancing blow, and in the interval between the drop from one cam to thecommencement of the next incline they rnb steadily with their fullweight, producing a grinding and pulverizing effect. The number of dropsper minute correspond to thenumber of stamps multiplied by thc number ofcams, and the product multiplied by the number of revolutions of theframe Gr. The weight of the 10o stamp varies from forty pounds to oversix hundred; but it can he inoreased,if necessary, by placing upon thestem an auxiliary weight having a hole to fit the stem. I nd itpracticable to drop the stamps one hundred and eighty times each perminutenearly twice as often as in the stamp-mills ordinarily used.

Having thus described my invention, what I claim is- 1. In aquartz-mill, the combination ot' a base-plate, a revolving framecarrying a series of stamps, and a series of stationary cams, wherebythe stamps are given a vertical movement to crush and a horizontalmovement to grind the quartz.

case A, the frame Gr, mounted on a vertical shaft, gearing D W forgiving said frame a rotary motion, the stamps L, mounted in frame G andhaving stems H, provided with hearingrollers S, and the inclinedstationary cams K.

3. In combination with the cone N and the revolving frame G, mounted inthe shaft C, an imperforate splash-plate, 0, mounted on the said coneand surrounding said shaft.

4. In combination with the upper rim or edge of the shell A, the cams K,provided with a slot and having the set-screw I.

ALBERT E. REDSTONE.

VitneSSeS:

JOHN H. REDs'roNE, H. P. VVILLARD.

